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[1-4] along a boardwalk near Akanuma (Red Bog) in Kushiro Mire, eastern Hokkaido. [1-3] on August 30 2014. [4] on June 28 2015. [5] in Shizukari wetland, southern Hokkaido, on June 15 2015. [6] near a peatland mined in 1982 on August 28 2018.